package com.sky.service.admin.impl;

import cn.hutool.core.util.ObjectUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.*;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.properties.JwtProperties;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.admin.EmployeeService;
import com.sky.utils.JwtUtil;
import com.sky.vo.EmployeeLoginVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    @Autowired
    private JwtProperties jwtProperties;




    /**
     * 编辑员工信息
     *
     * @param employee
     */
    public void update(Employee employee) {
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

    @Override
    public Result<Employee> findById(Long id) {
        // 一.校验参数
        if(Objects.isNull(id)) {
            throw new ParameterIsNullException("ID不能为空");
        }
        // 二.处理业务
        Employee employee = employeeMapper.selectById(id);
        if(Objects.isNull(employee)) {
            throw new EmployeeNotExistException("员工不存在");
        } else {
            //脱敏
            employee.setPassword("");
        }
        // 三.封装数据
        return Result.success(employee);
    }





    /**
     * 启用禁用员工账号
     *
     * @param status
     * @param id
     * @return
     */
    @Override
    public Result<String> startOrStop(Integer status, Long id) {
        // 一.校验参数
        if(Objects.isNull(status)
                || Objects.isNull(id)) {
            throw new ParameterIsNullException("员工状态与ID均不能为空");
        }
        // 二.处理业务
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.updateStatusById(employee);
        // 三.封装数据
        return Result.success();
    }

    /**
     * 分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public Result<PageResult> pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // 一.校验参数
        int page = employeePageQueryDTO.getPage();
        int pageSize = employeePageQueryDTO.getPageSize();
        if(page <= 0 || pageSize <= 0) {
            throw new ParamsIllegalException("分页参数非法");
        }
        // 二.处理业务
        // 1.分页设置
        PageHelper.startPage(page, pageSize);
        // 2.条件查询
        Page<Employee> empPage = employeeMapper.selectPageByName(employeePageQueryDTO.getName());
        // 三.封装数据
        PageResult pageResult = PageResult.builder()
                .total(empPage.getTotal())
                .records(empPage.getResult())
                .build();
        return Result.success(pageResult);
    }
    /**
     * 新增员工
     *
     * @param employeeDTO
     * @return
     */
    @Override
    public Result<String> save(EmployeeDTO employeeDTO) {

        if (ObjectUtil.isEmpty(employeeDTO)){
            throw new RuntimeException("参数错误");
        }
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);

        Employee dbEmployee = employeeMapper.getByUsername(employee.getUsername());
        if (ObjectUtil.isNotNull(dbEmployee)){
            throw new RuntimeException(dbEmployee.getUsername()+"用户名已存在");
        }

        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        LocalDateTime now = LocalDateTime.now();
        employee.setStatus(StatusConstant.ENABLE);
        employee.setCreateTime(now);
        employee.setUpdateTime(now);
        employee.setCreateUser(10L);
        employee.setUpdateUser(10L);

        employeeMapper.insert(employee);
        return Result.success();
    }


    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    @Override
    public Result<EmployeeLoginVO> login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //校验参数
        if (ObjectUtil.isEmpty( username) || ObjectUtil.isEmpty(password)){
            throw new RuntimeException("用户名或密码不能为空");
        }


        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (StatusConstant.DISABLE.equals(employee.getStatus())) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //登录成功后，生成jwt令牌
        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.EMP_ID, employee.getId());
        String token = JwtUtil.createJWT(
                jwtProperties.getAdminSecretKey(),
                jwtProperties.getAdminTtl(),
                claims);
        EmployeeLoginVO employeeLoginVO = EmployeeLoginVO.builder()
                .id(employee.getId())
                .userName(employee.getUsername())
                .name(employee.getName())
                .token(token)
                .build();
        return Result.success(employeeLoginVO);
    }
}
